Friction-clutch.



G. TUGKFIELD.

FRICTION CLUTCH.

APPLICATION FILED 19.27.1908.

Patented Oct. 5, 1909 Q i v a sums-sum .WI' 3w.

c. 'TUOKFIELD. I FRICTION CLUTCH. APPLICATION 11,121) AUG. 27, 1908.

936,190. Patented 0ct.5, 1909.

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'- following is a specification.

Be it known that 1, CHARLES TUGKFIELD,

rey, 'England, have invented a new and use- Tuc'kfield and Garlands British Patent No.

thejextendedportion of the screwedspindle 'to. the face with' which the idle member ated.

accompanying drawings, in which To all whom it may concern: I

a subject of the King of'Grre-at Britain, residing ate Thames View, East Molesey, Surful lmproved Friction-Clutch, of which the 1 My invention relates to friction clutches of-thetype described in the specification of 11329 of 1906..- W I The .chie-f objects of the present. invention are to provide greater frictional contact between -the.opposing members of the clutches and to avoid the end thrust which is occasioned by the screwing action of the idle member in this type of clutch.

According to my invention I extend the screwed spindle which either formed upon rengages with the driven shaft and controls the. idle clutch member and I provide with a flange 1 or the equivalent, the said flange being designed to engage with the opposing clutch member or with a plate attached thereto'on that face which islopposite makes contact. With this construction, when the clutch is put into operation, the aforementioned flange is drawn into frictional contact with the rotating clutch member or with the. plate attached thereto which is thereby gripped on either. side, that is to say, on the one side by the .fiangeand on the other side by the idle member of the clutch. It will, therefore, be obvious that not only is the frictional contact greater than as is the case with clutches of this type as hitherto made but that the,injurious effect of the end thrust set up by the screwed spindle is pbvi- To enable the invention to be fully understood, I will describe it by reference to'the Figure 1 is a sectional elevation of one form; of clutch made according to'the invention, and Fig. 2 is a similar view illustrating a modification.

Referring first to the construction of clutch shown in Fig. l, a represents the d-IlV ing shaft and b the driven shaft, the driving shaft a having mounted upon it the casing c which serves as an oil bath andwhich is fitted internally with the plate '(Z. The driven shaftb has formed upon it the screwed spindle e which engages with an f spearheadin Letters ream.

g PATENT am se Faic'ridifgcturcn. j

internally screw-threaded sleeve f provided with 'theplate' g;.the"plate forms the idle. clutchymember and lies adj acentea'o the aforementioned plate (2 forming the rotating clutch 1 member. The screwed spindle e is, as above.-

described, extended in'lengthas shown at it,

and passes through the central' opening d y t v [Patent-6.100s. 5, 1909;

Application fiiediiaga's't'gv, 1908, Serial No. 450,483; a

formed in'the plate (1, its projecting end 3 carrying 'the flange The sleeve f is car: ried in the bearing f and a spiral spring 9' coiled around the shaft 6 bears at one end 7 end of the said sleeve f so' as to normally against the collar k keyed upon the said shaft, and at the other end against the outertend to press the same in the direction of say, when the sleeve f is released by the forked lever, the spring j forces forward the idle clutch member 9 (the pitch of the screw e allowing of this) into contact with themtating clutch plate cl, the said member in its movement turning upon the screw 6. The friction set up between the said plate (1 and the member 9 has, the tendencyto still furtherturn the member g on the screw 6,

engagement with the clutch plate 42. f is.

but this turning movement is prevented by the contact of the flange i with the rear surface of the clutch plate (Z so that the result is that the member 9 is pressed more forcibly against the clutch-plate a? and at the same time the injurious effect of the end thrust which, as mentioned above, accompanies this type of clutch as hitherto constructed, is obviated. y The form of clutch illustrated in F i' 2 is similar to that shown in Fig. 1, the di orence being that the driven shaft 1) is formed as the continuation of the-sleeve f instead of as a continuation of the screwed spindle e, the sprlng j being consequently coiled around the said sleeve within the casing 0.

The action of this form of clutch is'the same 16 as that hereinbeforedescribed.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

' 1. In a friction clutch,'the combination with a rotating member, of an idle member .comprising'xtwo partslocated on opposite.

sides of the rotating member, and one of which is rigid with the driven shaft, a screw connection between the two parts of the idle member, a; spring for normally holding one part of the idle member in contact with the rotating member so as to draw the said two parts toward one another to grip the rotating member, and means for withdrawing the contacting idle member from the rotating member, substantially as described. o

2. A friction clutch comprising a rotating I member keyed .upon the driving shaft, an

idle member which engages a screw thread upon the driven shaft, an extension upon the driven shaft thron h the. idle member, a flange upon the sa-i extension, means such as a spring for holding the idle member in engagement with the rotating member, and means for withdrawing the said two members from contact,-substantially as described.

CHARLES TUCKFIELD. Witnesses: A

'- C. G. REDFERN, E. E. Duns. 

